1. Attillio Melera, Technical Paper No. MS-10, Hewiett-Packard.
2. R. Schuster, Anal. Chem.52, No. 4 (1980).
3. T. J. Mabry, K. R. Markham, M. B. Thomas, The Systematic Identification of Flavonoids, Springer Verlag.
4. G. Guiochon, p. J. Arpino, Anal. Chem.51, No. 7 (1979).
5. A. M. Verney, A. M. Debelmas, Annales Pharmaceutiques, Francaises6, 475 (1973).